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We now know what caused yesterday's nationwide outage for AT&T cellular customers yesterday. Or at least what the telecommunications giant says caused yesterday's outage.
"Based on our initial review, we believe the outage was caused by the application & execution of an incorrect process used as we were expanding our network, not a cyberattack," AT&T posted on X.
Service for many customers went out early Thursday morning and was down for more than 12 hours before it was fully restored.
"We are continuing our assessment to ensure we keep delivering the service that our customers deserve," the company said.
Downdetector, a website that tracks phone and internet service outages, reported AT&T service was down mostly in the Houston, Atlanta, Chicago, and Miami service areas.
A U.S. defense official told Fox News there was "no indication it was a cyber attack."